Centering that isn't centered

Hi folks – This is a minor but continuing source of annoyance to me: When I apply ^e to center some text, the “centered” text is offset by the amount of the paragraph indent. Now, I can fix it by moving the little rectangle on the ruler line to zero. But that gets old really fast and seems silly. Do I really need to do that every time I insert a scene break mark, etc.?

Is there some way to set a preference for “centered” to mean “centered” – not “centered offset by half an inch”?

Or, since I have created a preset format for “true centered” can I somehow assign the ^e keyboard shortcut to that, instead of the built-in command? (Because mousing to the preset command is even more fiddly than moving the marker on the ruler.)

Thanks.